This can cause unexpected behavior when doing manipulation at compile time - removing subroutines will still allow them to be called from within the package as subroutines (although they will not be available as methods). This can be considered a feature in some cases (this is how namespace::clean works, for instance), but should not be relied upon - use remove_glob directly if you want this behavior.

Some minor memory leaks

The pure perl implementation has a couple minor memory leaks (see the TODO tests in t/20-leaks.t) that I'm having a hard time tracking down - these may be core perl bugs, it's hard to tell.